1. Department of Respiratory Medicine Amsterdam UMC, University of Amsterdam Amsterdam The Netherlands
2. Dipartimento Universitario di Promozione della Salute Materno Infantile, Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(PROMISE) c/o Pneumologia University of Palermo Palermo Italy
3. AOUP “Policlinico Paolo Giaccone” Palermo Italy
4. Respiratory Research Unit Bispebjerg University Hospital Copenhagen Denmark
5. Department of Pediatric Pulmonology Amsterdam UMC, University of Amsterdam Amsterdam The Netherlands
6. The Institute of Environmental Medicine Department of Medicine Solna Campus, and Center for Molecular Medicine Karolinska Institutet Stockholm Sweden
7. The Center for Allergy Research Department of Medicine Solna Campus, and Center for Molecular Medicine Karolinska Institutet Stockholm Sweden
8. Department of Respiratory Sciences University of Leicester Leicester UK